Ⅱ型裂纹应力强度因子和应变能释放率关系的分析

摘要

根据裂纹闭合单位面积所做的功等于裂纹扩展单位面积所释放的能量的关系来对Ⅱ型裂纹的扩展进行理论分析,推导出了Ⅱ型裂纹的G,K关系,且在ANSYS中建立有限元模型对Ⅱ型应力强度因子进行计算并与强度因子手册中的公式进行验证.%This paper, based on the relationship that the crack closure work done in unit area should be equal to the energy released with the crack growth per unit area, make the theoretical analysis for type Ⅱ crack, and deduce the relationship between G and K of the type Ⅱ crack. Simultanously, the finite element model is established in ANSYS to calculate and verify the stress intensity factor of the type Ⅱ crack.